Agricultural covering material

Abstract

The purpose of the present invention is to provide an agricultural covering material which has a high light transmittance so that it accelerates the growth of crops and has visual confirmation properties to the inside thereof for cultivators, which has a good growth acceleration effect due to heat retention of soil temperature, can suppress ingress of excess amounts of rainwater, has excellent evenness such as a low unevenness in strength and effective prevention of harmful insects which will fly and gather, and which has proper air-permeability. The agricultural covering material of the present invention includes a nonwoven fabric laminate having (i) a light transmittance of 80% or more, (ii) an air-permeability of 50 to 400 cm 3 /cm 2 /sec and (iii) a basis weight of 10 to 30 g/cm 2 .

1 . An agricultural covering material comprising a nonwoven fabric laminate having;
 (i) a light transmittance of 80% or more,   (ii) an air-permeability of 50 to 400 cm 3 /cm 2 /sec and   (iii) a basis weight of 10 to 30 g/cm 2 .   
     
     
         2 . The agricultural covering material according to  claim 1 , wherein the nonwoven fabric laminate is obtainable by laminating a spun bonded nonwoven fabric (B) having a basis weight of 5 to 25 g/m 2  and comprising thermoplastic resin fibers having a fiber diameter of 15 μm or more on at least one side of a melt blown nonwoven fabric (A) having a basis weight of 0.1 to 3 g/m 2  and comprising thermoplastic resin fibers having a fiber diameter of 0.1 to 10 μm, with partially heat fusion bonding. 
     
     
         3 . The agricultural covering material according to  claim 1 , wherein the nonwoven fabric laminate is obtainable by laminating the spun bonded nonwoven fabrics (B) on both sides of the melt-blown nonwoven fabric (A). 
     
     
         4 . The agricultural covering material according to  claim 2 , wherein the thermoplastic resin fibers are olefin polymer fibers. 
     
     
         5 . The agricultural covering material according to  claim 4 , wherein the olefin polymer fibers are propylene polymer fibers. 
     
     
         6 . A method of cultivating a crop which method comprises covering a crop using the agricultural covering material according to  claim 1 . 
     
     
         7 . A method of cultivating a crop which method comprises covering a crop using the agricultural covering material according to  claim 2 . 
     
     
         8 . A method of cultivating a crop which method comprises covering a crop using the agricultural covering material according to  claim 3 . 
     
     
         9 . A method of cultivating a crop which method comprises covering a crop using the agricultural covering material according to  claim 4 . 
     
     
         10 . A method of cultivating a crop which method comprises covering a crop using the agricultural covering material according to  claim 5 .